I'd prefer to retain the 2.1 SLSB if I can... is there a reason that Array-type inputs should not work under JAX-RPC with the server/JBossWS config I described? Please let me know if you see anything obviously wrong with my WSDL/code/artifacts... I could not find many other references to this Exception in the forum. If it helps, here is an extract from my mapping.xml file, also (currently) generated by wscompile: | <?xml version="1.0" encoding="UTF-8" standalone="no" ?> | <java-wsdl-mapping xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | version="1.1" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://www.ibm.com/webservices/xsd/j2ee_jaxrpc_mapping_1_1.xsd"> | <package-mapping> | <package-type>com.business.WebService.messageProcessing</package-type> | <namespaceURI>InboundWebService</namespaceURI> | </package-mapping> | <package-mapping> | <package-type>com.business.WebService.messageProcessing</package-type> | <namespaceURI>InboundWebService</namespaceURI> | </package-mapping> | <java-xml-type-mapping> | <java-type>com.business.WebService.dto.ServiceStatus</java-type> | <root-type-qname xmlns:typeNS="InboundWebService">typeNS:ServiceStatus</root-type-qname> | <qname-scope>complexType</qname-scope> | <variable-mapping> | <java-variable-name>code</java-variable-name> | <xml-element-name>code</xml-element-name> | </variable-mapping> | <variable-mapping> | <java-variable-name>subject</java-variable-name> | <xml-element-name>subject</xml-element-name> | </variable-mapping> | </java-xml-type-mapping> | <java-xml-type-mapping> | <java-type>com.business.WebService.dto.CustomField</java-type> | <root-type-qname xmlns:typeNS="InboundWebService">typeNS:CustomField</root-type-qname> | <qname-scope>complexType</qname-scope> | <variable-mapping> | <java-variable-name>name</java-variable-name> | <xml-element-name>name</xml-element-name> | </variable-mapping> | <variable-mapping> | <java-variable-name>value</java-variable-name> | <xml-element-name>value</xml-element-name> | </variable-mapping> | </java-xml-type-mapping> | <java-xml-type-mapping> | <java-type>com.business.WebService.dto.ServiceRequest</java-type> | <root-type-qname xmlns:typeNS="InboundWebService">typeNS:ServiceRequest</root-type-qname> | <qname-scope>complexType</qname-scope> | <variable-mapping> | <java-variable-name>customFields</java-variable-name> | <xml-element-name>customFields</xml-element-name> | </variable-mapping> | </java-xml-type-mapping> | <service-interface-mapping> | <service-interface>com.business.WebService.messageProcessing.LiaisonB2BWebServiceInterface</service-interface> | <wsdl-service-name xmlns:serviceNS="InboundWebService">serviceNS:LiaisonB2BWebServiceInterface</wsdl-service-name> | <port-mapping> | <port-name>MessageEndPointPort</port-name> | <java-port-name>MessageEndPointPort</java-port-name> | </port-mapping> | </service-interface-mapping> | <service-endpoint-interface-mapping> | <service-endpoint-interface>com.business.WebService.messageProcessing.MessageEndPoint</service-endpoint-interface> | <wsdl-port-type xmlns:portTypeNS="InboundWebService">portTypeNS:MessageEndPoint</wsdl-port-type> | <wsdl-binding xmlns:bindingNS="InboundWebService">bindingNS:MessageEndPointBinding</wsdl-binding> | <service-endpoint-method-mapping> | <java-method-name>processMessage</java-method-name> | <wsdl-operation>processMessage</wsdl-operation> | <method-param-parts-mapping> | <param-position>0</param-position> | <param-type>com.business.WebService.dto.ServiceRequest</param-type> | <wsdl-message-mapping> | <wsdl-message xmlns:wsdlMsgNS="InboundWebService">wsdlMsgNS:MessageEndPoint_processMessage</wsdl-message> | <wsdl-message-part-name>ServiceRequest</wsdl-message-part-name> | <parameter-mode>IN</parameter-mode> | </wsdl-message-mapping> | </method-param-parts-mapping> | <wsdl-return-value-mapping> | <method-return-value>com.business.WebService.dto.ServiceStatus</method-return-value> | <wsdl-message xmlns:wsdlMsgNS="InboundWebService">wsdlMsgNS:MessageEndPoint_processMessageResponse</wsdl-message> | <wsdl-message-part-name>result</wsdl-message-part-name> | </wsdl-return-value-mapping> | </service-endpoint-method-mapping> | </service-endpoint-interface-mapping> | </java-wsdl-mapping> | Thanks again. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4092096#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...